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Date: Mon, 16 Jun 2014 08:31:39 -0700
Message-ID: <CAKOQZ8zk8KfkObSZg8fmhZXm9nXQSneOywvV-NBj=N-tNWjNPg@mail.gmail.com>
Subject: Re: [RFC 0/2] __vdso_findsym
From: Ian Lance Taylor <iant@golang.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andy Lutomirski <luto@amacapital.net>, "H. Peter Anvin" <hpa@zytor.com>,
        Rich Felker <dalias@libc.org>,
        Mikael Pettersson <mikpelinux@gmail.com>, Russ Cox <rsc@golang.org>,
        Linux API <linux-api@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        X86 ML <x86@kernel.org>
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Sender: linux-kernel-owner@vger.kernel.org

On Mon, Jun 16, 2014 at 7:38 AM, Andi Kleen <andi@firstfloor.org> wrote:
>> I think this issue started when some of the Go developers questioned
>> why the kernel needed to provide a very complex interface--parsing an
>> ELF shared shared library--for very simple functionality--looking up
>> the address of a magic function.  This approach has required special
>> support not just in Go, but also in the dynamic linker and gdb, and
>> does not work well for statically linked binaries.  The support in gdb
>> is perhaps a good idea, but elsewhere it does not make sense.
>>
>> So why not provide a simple interface?
>
> What good would it do now that everyone already supports it?

Do statically linked binaries use the vDSO calls?

Ian
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